User Matt N. - Mathematics Stack Exchange

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	15,220 reputation	bio	website		visits	member for	2 years, 4 months
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Need a crash course in fourier analysis, recommend resources

sep 13 at 13:21 AndreasS 524

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3

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1

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242

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$\ell_{p}$ space is not Hilbert for any norm if $p\neq 2$

functional-analysis hilbert-spaces lp-spaces

oct 28 at 6:27 Martin Sleziak 20.3k

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3

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177

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Fourier Series: Integral of a Sum or Sum of Integrals?

real-analysis pde fourier-series

oct 14 at 15:13 Jonas Teuwen 6,856

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2

answers

90

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Direct limit of $\mathbb{Z}$ homomorpisms

abstract-algebra group-theory abelian-groups

oct 18 at 17:31 mercio 11.2k

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2

answers

176

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Any example of manifold without global trivialization of tangent bundle?

differential-geometry manifolds

oct 25 at 1:57 Neal 6,433

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1

answer

295

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subbasis for a topology Munkres

general-topology

sep 12 at 19:18 Vien Nguyen 128

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2

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1

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262

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Show smooth functions of compact support are dense in the Schwartz space

functional-analysis fourier-analysis

nov 11 at 16:28 Matt N. 15.2k

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1

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64

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homeomorphism between the usual hawaiian ring and the onesided hawaiian ring

general-topology connectedness

nov 16 at 1:17 Brian M. Scott 154k

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2

votes

2

answers

233

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Finitely generated projective module

commutative-algebra modules

nov 20 at 6:43 Matt N. 15.2k

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votes

1

answer

64

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How does one define a standard model of ZFC?

set-theory model-theory

feb 22 at 1:35 Asaf Karagila 90.2k

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1

answer

71

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when is $\mathbb P_{\mathcal {A}}$ separative?

set-theory

apr 1 at 1:08 Brian M. Scott 154k

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1

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70

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Finding an ON basis of $L_2$

functional-analysis fourier-analysis hilbert-spaces

apr 20 '12 at 18:12 Norbert 19.8k

2

votes

1

answer

169

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Need help discerning category isomorphism

category-theory

apr 20 '12 at 14:51 Byron Hawkins 39

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2

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0

answers

101

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Altering L^{2} functions so that the FTC holds

real-analysis fourier-analysis

apr 15 '12 at 18:47 jmracek 344

2

votes

1

answer

182

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How to prove that every infinite cardinal is equal to $\omega_\alpha$ for some $\alpha$?

homework elementary-set-theory cardinals

jan 14 '12 at 22:24 Asaf Karagila 90.2k

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248

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Outer measure and Caratheodory measure

measure-theory

jun 6 '12 at 17:34 Community♦ 1

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2

answers

76

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How can one see that $\operatorname{tr}(f\otimes g)=\operatorname{tr}f\operatorname{ tr }g$?

commutative-algebra tensor-products multilinear-algebra

mar 25 '12 at 21:06 Alex Youcis 12.4k

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2

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1

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146

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An orthonormal family in an inner product space

functional-analysis hilbert-spaces inner-product-space

apr 24 at 14:59 Community♦ 1

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votes

2

answers

116

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Proving that $\|x\|_2 \geq \|x\|_1$?

analysis norm

apr 7 '12 at 12:03 Did 102k

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2

votes

1

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97

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Example of sets with additive property

combinatorics additive-combinatorics

apr 9 '12 at 8:02 Brian M. Scott 154k

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0

answers

99

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how to estimate the norms simultaneously?

functional-analysis

jan 21 '12 at 10:00 Martin Sleziak 20.3k

2

votes

2

answers

262

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elementary question about tensor product of modules

commutative-algebra modules

apr 18 '11 at 20:57 Pandora 1,351

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2

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1

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311

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How to show multiplication and inversion are continuous in this topology on $C(X)$?

general-topology

may 18 '12 at 19:54 Robert Israel 86k

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1

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303

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Banach space in functional analysis

functional-analysis banach-spaces

apr 10 '12 at 18:51 t.b. 43.1k

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2

answers

310

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Finding a primary decomposition

abstract-algebra commutative-algebra ring-theory ideals

jun 29 at 20:50 Matt N. 15.2k

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votes

1

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130

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What is meant by the Grothendieck group being the “best possible” construction of an abelian group from a commutative monoid?

group-theory commutative-algebra category-theory

jul 23 at 11:22 Matt N. 15.2k

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1

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235

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Definition of locally convex topological vector space

topological-vector-spaces

feb 28 '12 at 7:45 Tim van Beek 3,447

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votes

2

answers

1

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spectrum of right shift operator

functional-analysis spectral-theory

jan 9 '12 at 15:11 Jack 7,491

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2

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1

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396

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Multiplication operator norm

homework analysis norm normed-spaces

dec 6 '11 at 5:36 Srivatsan 15.6k

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1

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102

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First derivative bounded by supremum of difference of values in disc

homework complex-analysis

nov 13 '11 at 15:45 Davide Giraudo 56k

Matt N.

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